Floor door closer



Aug. 10 1926. 1,595,723

| c. NORTON FLQOR DOOR CLOSER Filed ept- 5, 1924 2 Sheets-Sheet l J a? Aug. 10 1926. 1,595,723.

1.. c. NORTON FLOOR DOOR CLOSER 0 1M 5 w W Patented Aug. 10, 192s.

. UNITED STATES LEWIS c. women, or cnrcaeo,

ILLINOIS ABSIGNOB TO NORTON DOOR CLOSER COM PANY, OI GHIGAQO, ILLINOIS, A. CORPORATION 01' WEST VIRGINIA.

noon noon onosmz.

Application and Mama. 5, 1924. sum in. 786,044.

My invention relates to door closers. One-of the objects of my invention is to provide a door closer which will give the proper amount of pull on, the door at all sta es of its opening and closing movement. .2 further object of my invention is to provide an improved door bar construction which will enable the door bar to be readily attached to the pivot pin after the door bar has been fastened to the door and with the door in position in the door'frame.

- Further objects will appear from the description and claims. g V In the drawings, in which an embodiment 1 of my invention is shown,

- Figure 1 is a plan view of a floor door.

closer;

Fig. '2 is a horizontal section showing-the position assumed when the door is wide open; I V

Fig. 3 is a vertical sectional view; Fig. 4 is a view showing the door in position' on the door bar; i Fig. 5 is a section on theline 5-5 of Fig. 1;

Fig. 6 is a section on the line 6 6- of Fig. 5; and

Fig.. 7 is a section on the line 7.-7 of- Fi 6. 0 fieferring to the drawings, in detail, the construction. shown comprlses a casmg 10 which is placed below the floor level, an' oil. containingmylinder 11 in the casing, a plunger or piston 12 operating in the cylinder, :1 vertical main pivot 13 mounted in the casthe mam pivot, and transmisslon from the plunger to this laterally extending arm.

In my prior application, Serial No.

626,738, I'have shown a floor door closer a short arm 14' extending laterally from bait and meshingiwith the oscillate'with the pinion and a"link 19 pivotally connected at its ends at 20 and 21 with the two laterall extending arms 18 and 14, respectively, he presengonstruction re- 'tains the advantages obta ed by the two.

laterally extending arms and link connectlon of my prior construction and eliminates ayarlable element by providing a rack and pinlon transmi$ion from the rock shaft to the plunger so that the speed ratio of the plunger with respect to the vertical rock shaft remains constant. I find that thls combination of the rack and pinion drive between the vertical rock shaft and the plunger with the two-arm and connectin l1nl r transmission betiwen the rock shaft an mam pivot pin gives the most desirable results so far as spring pull on the door is concerned, of any construction whichI have devised.

A coil compression spring 22 is provided for efiectmg the closing movement of the door. The movement of the plunger-12 is regulated by means of, two screw valves 23 and 24 which. restrict the flow oioil. The screw, valve 23 controls the closing of the. door u to final closing movement which is contro ed by the other screw valve The flow of oil up to the'final closin movement is through the port 25 and pastt e valve 23. After the edge of the lunger asses the port 25, the flow of oil is t rough t eport 26-and past both of the valves. The usual check valve 27 is provided, permitting the door to be easily opened.

In order to enable the door to be easily secured on the u per end of the pivot p1n,'I

. provide a door ar having a laterally extendmg arm 29' which is secured to t e under si e of the door 30 and having a'two-part head 31 .split on a vertical plane which is clamped onto the upper end of the main pivot, by means of a pair of screws 32. B this constructiomthe' door-bar can be eas' y se-. cured to the pivot pin after-the doorbar is secured tothe lower edge of the door and while the door is in position in thedoor- 1 'fi'am'e, as the door does not have to be lifted up to slip the doorcbarover the top of the main pivot pin. In order to secure just the right-vertical adjustment of the door, I provi e a nut 33 underneath the head of the! door bar which is threaded on the threaded.

upper end of the main pivot pin so that by disturb the mounting of the main pivot pin turning it to the right or left, the door bar can be adjusted up or down.

The link 19 is bent to provide clearance for the main pivot 13 when the door is in wide open position, as shown in Fig. 2. This enables the link to move to a dead center position in which the door will be held open against any pressure the spring 22.

I also provide adjustable means similar to those described in my prior application, whereby the door may be frictionally held in any desired open position. Briefly, these means comprise a pair of disks, 34, 35, having right and left screw threaded engagement, respectively, with the main pivot pin 13. Means are provided for setting the upper disk 34 to vary its vertical position and thus vary the time at which the two disks will come into engagement on the opening movement of the door. The means for setting the upper threaded disk comprise a vertical shaft 36 having a screw head accessible for setting by means of a screw driver, a

exerted by pinion 37 mounted on this vertical shaft 36,

and an idler gear 38 meshing with this pinion 37 and also meshing with the teeth 39 with which the edge of the screw threaded disk 34 is provided; The lower disk which is threaded on the lower end of the main pivot is held against rotation by means of 3.

the two disks are right and left hand, re-

spectively, so that rotation of the main pivot will cause these disks to approach or move away from each other. When the two disks come together, the door will be held against further movement. By proper setting of the any desired position.

In order to facilitate the inspection and repair of the mechanism, I provide certain covers and sub-assemblies, wherebythe closing and checking mechanism can be removed without disturbm the main pivotand its mounting, and whereby, when desired, the main pivot and its mounting and cover can be readily removed as a unitary sub-assembly. -With this vieWI provide two cover portions, a large cover portion 41 overlying the closing and checking mechanism and a small COVGr member 42 provided with a bear.- ing 43 for the main door pivot. 'The re moval of the large cover member 41 aflords access to the closing and checking mechanism which can be readily'removed if desire by loosening up the screw 36 which holds the roller 37; If it is desired toremove the main pivot with its bearing, it can be readily done simply be removing the cover screws 44 and taking out either the screw 20 or 21 to disconnect the main pivot from-the checking in its cover member and making inspectlon or repairs.

A further refinement of the controlof the final movement may be effected by providing notches 45 and 46 in. the piston (Fig. 7). The tapering notch 45 prevents a sudden checking of the door when the edge 47 of the piston passes the port 25 as this tapered notch allows a gradually restrictedfiow as the movement of the piston continues. The abruptly tapering notch 46 permits a quick final closing moving of the door to insure the snapping of the latch into place. As this abruptly tapering notch comes into registration with the port'25 it permits a free flow of the oil through the port 26, past the 1. A door closer comprising a vertical pivot member on which the door is mounted,

-a laterally extending arm secured to said pivot, a cylinder, a plunger reciprocable in said cylinder and transmission from said plunger to said laterall comprising a rack secure to the plunger, 2. vertical shaft, a pinion mounted on said rock shaft and meshing with said rack, a second extending arm,

laterally extending arm mounted on said shaft and oscillatable with said pinion and a link pivotally connected at its ends to said laterally extending arms respectively.

2. "A door closer comprising a vertical pivot member on which the door is mounted a laterally extending. arm secured to .said pivot, a cylinder, a plunger reciprocable in 7 said cylinder vand transmission from said upper disk, the door may beheld open in plunger to said laterally extending arm,

comprisinga rack secured to the plunger, 21.

shaft and oscillata le with said pinion and a link pivotally connected at its ends to said laterally extending arms respectively, the effective lever arm of said second laterally extending arm increasing as the door is opened.

3. A door closer comprising a vertical pivot member on whichthe door is mounted, a laterally extending arm secured to said pivot, a cylinder, a plunger reciprocable in said cylinder and transmission from said plunger to said laterally extending am,

comprising a rack secured to the plunger, a

vertical shaft, a pinion mounted on. said ro'ck shaft and meshing with-said rack, a'

second laterally extending arm mounted on said shaft and oscillatable with said pinions, and a link ivotally connected at its ends to said later y extending arms respectively,

said link movable to a position 111 which the center of the door pivot is between and in line with the pivotal points at the bar to be secured adjacent the lower edge of ends of the link, whereby the door may rethe door having members separable on a vermain in Wide open position against action of tical plane embracing the upper end of said 10 the plunger. pivot pin. w

5 4. A floor door closer construction com- In witness whereof, I havehereunto subprising a vertical pivot pin having-a portion scribed my name. extending above the floor level and a door LEWIS C. NORTON. 

